Ritron j-u410 ユーザーガイド

 

3 

  

To match other radios, the owner can select Frequency, Tone and DQC Codes from 

Table 1,

 

Table 2

 and 

Table 3

.  

In our example, we will program an LM-U450 to operate on the "Brown Dot" frequency of 464.500 MHz with 100.0 
Hz tone. 

 
 

1. Refer 

to 

Table 1

 

 to determine the two-digit frequency code and write it down. 

2. Refer 

to 

Table 2

  to determine the two-digit tone code for 100.0 Hz and write it down. 

3.  Loosen the (4) captive screws in the front corners of the case. These screws are captive to 

the housing; to prevent damaging them, DO NOT remove the screws from the housing. 

4.  Separate the case front from the case back, leaving the RPS-1A power supply or backup 

battery connected to the radio. 

 

NOTE:  The voltage of the batteries must be greater than 6 VDC to program properly. 

5. Press 

and 

HOLD the PROGRAM button. A "P" will appear on the program display as you 

enter program mode and the radio will beep rapidly. 

6. Release 

the 

 

button after the beeping has stopped. The radio will emit a triple 

beep indicating that the radio is in program mode and a hyphen will appear on the program 
display.   

7.  Scroll to the character “F” by clicking the PROGRAM

 

button until the program display 

shows the correct character. Pause—the radio will sound a low tone and show a hyphen 
across the center of the display to indicate that it is ready to accept the first digit of the 
frequency code. 

8.  Enter the 1

st

 digit of the frequency code by clicking the PROGRAM

 

button until the 

program display shows the desired number. Pause—the radio will sound a low tone and 
show a hyphen across the center of the display to indicate that it is ready to accept the 
next digit. 

9.  Enter the 2

nd

 digit of the frequency code by clicking the PROGRAM

 

button until the 

program display shows the desired number. Pause—the radio sounds a low tone and will 
show a hyphen across the center of the display to indicate that it is ready to accept the 
next digit. 

10.  Enter the 1

st

 digit of the tone code (or 1

st

 digit of the DQC code) by clicking the PROGRAM

 

button until the program display shows the desired number. Pause—the radio sounds a 
low tone and will show a hyphen across the center of the display to indicate that it is ready 
to accept the next digit. 

11.  Enter the 2

nd

 digit of the tone code (or 2

nd

 digit of the DQC code) by clicking the 

 

button until the program display shows the desired number. Pause—the radio 

sounds a low tone and will show a hyphen across the center of the display to indicate that 
it is ready to accept the next digit. 

12.  FOR DQC CODES ONLY – Enter the 3

rd

 digit of the DQC code by clicking the PROGRAM

 

button until the program display shows the desired number. Pause—the radio sounds a 
low tone and will show a hyphen across the center of the display to indicate that it is ready 
to accept the next digit. 

13.  Press and release the ENTER button to save your programming. A triple beep will sound to 

indicate that programming was successful and a hyphen will appear on the program 
display.  The radio is now ready for another program entry. 

 

NOTE:  An error tone will sound if you attempt to save an incorrect code, an "E" will appear 
on the display.  Check the digits you are attempting to enter, then re-enter.   

14.  Once you have made your final program entry, press the ENTER button a final time to exit 

programming mode.  The Program display will be blank and the radio will be ready for use.  
The Loudmouth

™

 will exit program mode automatically after 30 seconds if no program 

entries are attempted.